body{
    background-color: #f5f5f5;
    position: relative;
}
/* input,
textarea,
button {
    color: black;
    font-size: 12px;
    padding: 0;
    margin-top: 10px;
    border-style: none;
} */

/* .row {
    border: 1px solid #f5f5f5;
    position: relative;
} */



.main .nav_left {
    width: 80%;
    height: 100px;
    position: absolute;
    text-align: center;
    list-style: none;
    left: 20%;
    top: 180px;
   
}
.main .nav_left a{
    background-color:#66a0de ;
    color: #f5f5f5;
}
.main .nav_left a:hover{
    background-color: rgb(231, 231, 231);
}

.nav_left .submit,
.nav_left .look,
.nav_left .upload_file {
    margin-top: 30px;
    /* width: 150px; */
}

.control-label .control-labe{
    margin-top: 5px;
    padding-right: 15px;
    padding-left: 15px;
}

/* .mian_right {
    position: absolute;
    left: 0;
    top:30px;
    width: 100%;
    background-color: rgb(84, 147, 230);
} */

.mian_right .issue_work {
    /* width:90%; */
    /* background-color: bisque; */
    /* background-color: #fff; */
    /* background-color: rgb(167, 167, 167); */
    display: none;
    border-top: 1px solid #fff;
}

.mian_right .view {
    /* width: 100%; */
    /* height: 450px; */
    /* background-color: burlywood; */
    display: block;
}

.mian_right .form {
    width: 65%;
    /* height: 490px; */
    /* background-color: azure; */
    margin: 0 auto;
    /* margin-top: 10px; */
}

.mian_right .form .btn_send {
    margin-top: 30px;
    width: 95px;
}

.mian_right .form .btn_reset {
    margin-top: 30px;
    margin-left: 100px;
    width: 95px;
}

.form-group {
    margin-top: 10px;
}

.form-a{
    margin-top: 10px;
    color: rgb(71, 41, 241);
}
label {
    padding: 0;
}
.homework_commit{
    color: rgb(224, 44, 44);
}
.classEdit{
    color:skyblue
}
.classdate{
    color: red;
}
.header p {
    line-height: 30px;
    border-bottom: solid 1px rgb(216, 215, 215);
    margin-bottom: 20px;
}
.view {
    border-top: 1px solid #f5f5f5;
}

.view .table {
    width: 80%;
    height: 100%;
    margin: 0 auto;
    /* margin-top: 20px; */
}

.view .table tr th {
    text-align: center;
    height: 20px;
}
.uploadstuinfo .upload_box{
    width: 200px;
    height: 200px;
    position: absolute;
    right: 50%;
    top: 90px;
    margin-right: -100px;
}
.uploadstuinfo{
    display: none;
}